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Home ‣ Electronics ‣ Basic Op-Amp Circuits Comments
  • Question

  • A triangular-wave oscillator can consist of an op-amp comparator, followed by a(n)


  • Options
  • A. differentiator
  • B. amplifier
  • C. integrator
  • D. multivibrator

  • Correct Answer
  • integrator 

    • Basic Op-Amp Circuits problems

    Search Results

    • 1. 

      What has the voltage across the resistor decayed to by the end of the pulse in the given circuit?


    • Options
    • A. 0 V
    • B. 0.75 V
    • C. 5.55 V
    • D. 14.25 V
      • Discuss
    • 2. An RL integrator and an RC differentiator can act as what types of filters, respectively?

    • Options
    • A. low-pass, low-pass
    • B. low-pass, high-pass
    • C. high-pass, high-pass
    • D. high-pass, low-pass
      • Discuss
    • 3. 

      How long will it take the capacitor in the given circuit to discharge?


    • Options
    • A. 16.4 µs
    • B. 32.8 µs
    • C. 65.6 µs
    • D. 82 µs
      • Discuss
    • 4. If a periodic pulse waveform is applied to an RC differentiating circuit, which two conditions are possible?

    • Options
    • A. tw ≥ 5Τ or tw > 5Τ
    • B. tw = 5Τ or tw > 5Τ
    • C. tw ≤ 5Τ or tw < 5Τ
    • D. tw ≥ 5Τ or tw < 5Τ
      • Discuss
    • 5. 

      In the given circuit, what must the pulse width and time between pulses be to allow the capacitor to completely charge by the end of each pulse and to completely discharge between each pulse?


    • Options
    • A. 940 µs
    • B. 2.82 ms
    • C. 3.76 ms
    • D. 4.7 ms
      • Discuss
    • 6. A two-pole high-pass active filter would have a roll-off rate of

    • Options
    • A. 40 dB/decade
    • B. ?40 dB/decade
    • C. 20 dB/decade
    • D. ?20 dB/decade
      • Discuss
    • 7. Initially, the closed-loop gain (Acl) of a Wien-bridge oscillator should be

    • Options
    • A. Acl < 3
    • B. Acl > 3
    • C. 0
    • D. Acl ≅ 1
      • Discuss
    • 8. If the input to a comparator is a sine wave, the output is a

    • Options
    • A. ramp voltage
    • B. sine wave
    • C. rectangular wave
    • D. sawtooth wave
      • Discuss
    • 9. A zero-level detector is a

    • Options
    • A. comparator with a sine-wave output
    • B. comparator with a trip point referenced to zero
    • C. peak detector
    • D. limiter
      • Discuss
    • 10. The formula shows that for a given capacitor, if the voltage changes at a constant rate with respect to time, the current will

    • Options
    • A. increase
    • B. decrease
    • C. be constant
    • D. decrease logarithmically
      • Discuss

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